This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | 1 |
| 4 | 13 |
| 5 | -24 |
| 6 | -3 |
| 7 | 50 |
| 8 | -51 |
| 9 | 1 |
| 10 | 72 |
| 11 | -120 |
| 12 | 13 |
| 13 | 170 |
| 14 | -150 |
| 15 | -24 |
| 16 | 205 |
| 17 | -288 |
| 18 | -3 |
| 19 | 362 |
| 20 | -312 |
| 21 | 50 |
| 22 | 360 |
| 23 | -528 |
| 24 | -51 |
| 25 | 601 |
| 26 | -510 |
| 27 | 1 |
| 28 | 650 |
| 29 | -840 |
| 30 | 72 |
| 31 | 962 |
| 32 | -819 |
| 33 | -120 |
| 34 | 864 |
| 35 | -1200 |
| 36 | 13 |
| 37 | 1370 |
| 38 | -1086 |
| 39 | 170 |
| 40 | 1224 |
| 41 | -1680 |
| 42 | -150 |
| 43 | 1850 |
| 44 | -1560 |
| 45 | -24 |
| 46 | 1584 |
| 47 | -2208 |
| 48 | 205 |
| 49 | 2451 |
| 50 | -1803 |
| 51 | -288 |
| 52 | 2210 |
| 53 | -2808 |
| 54 | -3 |
| 55 | 2880 |
| 56 | -2550 |